The answer is atomic weight !
<span>C. New substances are always produced in chemical changes, which is not the case with physical changes. For example, when you cut wood into smaller pieces you still have wood in the end. But, with a chemical change you change the substance's whole composition. For example when you add two hydrogen's to one oxygen you have water and it can't break down from that. </span><span />
No :) They see different parts but I am a little confuse when you say the same part ;P
If it has a positive charge it is a cation if negative it is an anion .
I attached a chart that will help you know the charges of the elements